import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

//静态路由配置
void main() => runApp(const MyApp3());

//定义根目录Widget
class MyApp3 extends StatelessWidget {
  const MyApp3({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      localizationsDelegates: const [
        //初始化默认的 Material 组件本地化
        GlobalMaterialLocalizations.delegate,
        //初始化默认的 通用 Widget 组件本地化
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      //当前区域，如果为null则使用系统区域一般用于语言切换
      //传入两个参数，语言代码，国家代码
      //这里配制为中国
      locale: const Locale('zh', 'CN'),
      //定义当前应用程序所支持的语言环境
      supportedLocales: const [
        Locale('en', 'US'), // English 英文
        Locale('zh', 'CN'), // 中文
      ],
      routes: {
        //默认页面
        "/": (BuildContext context) => const Exam220HomePage(),
      },
    );
  }
}

///代码清单 3-1 Column的基本使用
///代码路径 lib/code3/code301_Column.dart
class Exam220HomePage extends StatelessWidget {
  const Exam220HomePage({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      //页面的头部
      appBar: AppBar(title: const Text("标题")),
      body: SizedBox(
        //宽度填充屏幕
        width: double.infinity,
        child: Column(
          //主轴方向包裹
          mainAxisSize: MainAxisSize.min,
          //主轴方向顶部对齐 默认方式
          mainAxisAlignment: MainAxisAlignment.center,
          //交叉轴方向左对齐  默认居中
          crossAxisAlignment: CrossAxisAlignment.start,
          children: const [
            Text("测试数据一"),
            Text("测试数据二"),
            Text("测试数据三"),
          ],
        ),
      ),
    );
  }
}
